De.fi does not charge any fees for any transactions taking place on our site. However, if you are transacting on a blockchain, the chain itself may charge some gas fees for the transaction to be executed. These may vary between chains, or due to how congested the blockchain is at any given time.
Some decentralized applications also charge fees for certain transactions, such as a tax on token withdrawals, or swap fees on swap transactions. These are not controlled by de.fi and may be present in some integrated applications.